Hi guys,
let's assume i have the following
1
x = 2
6
5
1 4
y = 3 5
8 10
i want the code to report back 1, 2 and 5 from x.
Basically it shopuld check whether each elements of x falls in the range of
each row of x. 1 and 2 falls in between 1-4 and 5 falls in between 3-5.
I do this with two for loops but in the case of very large list, it takes
ages.
best,
salih
On Fri, Jun 24, 2011 at 4:12 PM, Dennis Murphy <djmu...@gmail.com> wrote:
> Hi:
>
> That leaves open several possibilities. Could you please supply a
> small, reproducible example (i.e., one that someone can copy and paste
> into an R session) that illustrates the problem along with the
> solution you expect?
>
> TIA,
> Dennis
>
> On Fri, Jun 24, 2011 at 2:30 AM, Salih Tuna <saliht...@gmail.com> wrote:
> > Hi Dimitris,
> > Thanks for your reply. But this is not exactly what i am after. I want to
> > find the probes that falls into certain regions. In your solution it will
> > ignore the second probe if it falls into the same region as the first
> one.
> > Is there any vector trickb uilt in R to find whether probes fall into
> > certain regions?
> > best,
> > salih
> >
> > On Fri, Jun 24, 2011 at 10:23 AM, Dimitris Rizopoulos <
> > d.rizopou...@erasmusmc.nl> wrote:
> >
> >> One approach is the following:
> >>
> >> x <- rnorm(5)
> >> y <- matrix(rnorm(5*2), 5, 2)
> >>
> >> check <- y - x
> >> check[, 1] * check[, 2] < 0
> >>
> >>
> >> I hope it helps.
> >>
> >> Best,
> >> Dimitris
> >>
> >>
> >>
> >> On 6/24/2011 10:57 AM, Salih Tuna wrote:
> >>
> >>> Hi All,
> >>> What is the fastest way of finding if any members of vector x fall in
> the
> >>> range of the rows of matrix y?
> >>> I do not want to use two for loops as this will take forever.
> >>> Any help will be appreciated,
> >>> best,
> >>> salih
> >>>
> >>> [[alternative HTML version deleted]]
> >>>
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> >>>
> >>>
> >> --
> >> Dimitris Rizopoulos
> >> Assistant Professor
> >> Department of Biostatistics
> >> Erasmus University Medical Center
> >>
> >> Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
> >> Tel: +31/(0)10/7043478
> >> Fax: +31/(0)10/7043014
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> >>
> >
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> > PLEASE do read the posting guide
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> >
>
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